ThreeSUB.zip 315k .zip file
Alright - Got my third sub built....
The graph not as awesome as I expected. I literally tried every sub location combination I could think of while leaving the new end table sub where it's at. I am beginning to think I need to seriously figure out a way to re-arrange the furniture so I have a better seating position. I cannot imagine another location for a subwoofer. I tried all feasible corners, no corners, midwalls. I ended up with one sub in each front corner, and the side table sub. Tried turning off side table sub...didn't really help so I don't think its causing too much drama.
I attached the REW file so you can play with it. As you can see in the waterfall. It gets rid of a lot of the single frequency ringing, rather there is ringing over a large range.
I got lotso output now....gotta trap it up.
I cannot seem to get any progress with my panels...I have tried placing 4-6" ones in multiple different high pressure corners and not had much change on the graphs...starting to think I either need a LOT of treatment with those...not just a few corners.
Before+After and Audyssey On

I don't think so. When I measured that, spreading a fixed amount of absorption around a room did a better job than using fewer thicker absorbers. Even at the lowest frequencies. Have you ever actually measured a room both ways?

--Ethan

What I meant was WRT your statement Chunk traps use three times more material, but absorb only a little more bass than 4-6 inch thick panels is that at very low frequencies, the difference between 4-6" material and say 10-15" thick material can be quite great.

at very low frequencies, the difference between 4-6" material and say 10-15" thick material can be quite great.

Yes and No. If you take all the material needed to build four 2-foot wide "chunk" traps from floor to ceiling in each wall-wall corner, and instead use that to make as many 4-inch thick panels as possible and cover more corner surface, the 4-inch thick panels will absorb more even at the lowest frequencies. Of course, for a fixed amount of surface area, thicker panels do absorb well to a lower frequency. But then you've used much more material.

Yes and No. If you take all the material needed to build four 2-foot wide "chunk" traps from floor to ceiling in each wall-wall corner, and instead use that to make as many 4-inch thick panels as possible and cover more corner surface, the 4-inch thick panels will absorb more even at the lowest frequencies. Of course, for a fixed amount of surface area, thicker panels do absorb well to a lower frequency. But then you've used much more material.

--Ethan

I was thinking in terms of what works best, not how much material is used.

I was thinking in terms of what works best, not how much material is used.

Of course, but maybe I wasn't clear enough in my earlier post?

Quote:

Originally Posted by Ethan Winer

Panels 4 to 6 inches thick do a great job, and that's a better use of a fixed amount of material. Chunk traps use three times more material, but absorb only a little more bass than 4-6 inch thick panels.